Intel Core i3-12100E vs Intel Core i7-1260U Comparison

Head-to-Head Benchmarks

The two processors split the benchmark chart, but the wins are not evenly distributed. The Intel Core i3-12100E takes 13 of the 19 head-to-head tests, while the Intel Core i7-1260U manages 6 wins. The size of the victories matters more than the count.

The biggest single gap comes in Cinebench R23 multi-core. The i3-12100E scores 11,559 against the i7-1260U's 7,912.5, a 46.1% advantage. That is a massive margin for a sustained all-core workload. The i3-12100E also leads by 21.2% in Geekbench multi-core with 7,661 versus 6,320, and by 30.6% in Passmark extended instructions at 10,814 versus 8,280. These are not small edges; they show a clear pattern of superiority in heavily threaded and instruction-heavy tasks.

Single-core results are closer. The i3-12100E leads Cinebench R23 single-core by just 1.9% (1,631 versus 1,601), Cinebench R20 single-core by 2.5% (685 versus 668), Geekbench single-core by 13.7% (2,202 versus 1,936), and Passmark single-thread by 9% (3,438 versus 3,153). The i7-1260U does take Cinebench R15 single-core by a wide 25.3% margin (219.5 versus 164), but that is the outlier. The newer R20 and R23 versions of the same test both favor the i3-12100E.

The i7-1260U's wins are concentrated in specific areas. It leads Cinebench R15 multi-core by 3.2% (1,203 versus 1,164), Passmark data encryption by 14.9% (9,480 versus 8,069), Passmark integer math by 10.9% (45,887 versus 40,885), Passmark find prime numbers by 6% (67 versus 63), Passmark random string sorting by 3.8% (16,726 versus 16,089), and Passmark floating point math by 1.5% (31,456 versus 31,919, actually the i3 wins this one). Correcting that: the i7-1260U wins Cinebench R15 multi-core, data encryption, integer math, find prime numbers, and random string sorting. Those are meaningful but narrower victories, with the encryption and integer math gaps being the most notable.

Several tests land close to a tie. Passmark multithread shows 14,271 for the i3-12100E versus 14,011 for the i7-1260U, a 1.9% margin. Passmark floating point math is 31,919 versus 31,456, a 1.5% edge for the i3-12100E. Passmark data compression favors the i3-12100E by 5.2% (160,112 versus 152,217). The i3-12100E also wins Passmark physics by 13.3% (1,185 versus 1,046).

Architecture Differences

Both chips are built on Intel's Alder Lake architecture and use the same 10 nm process node from Intel. The shared DNA ends there. The i3-12100E is the desktop part, codenamed Alder Lake-S, while the i7-1260U is the mobile ultra-low-power part, codenamed Alder Lake-U.

Core counts differ substantially. The i3-12100E has 4 cores and 8 threads, a straightforward configuration with no hybrid design. The i7-1260U has 10 cores and 12 threads, which implies a mix of performance and efficiency cores typical of Alder Lake mobile parts, though the data does not specify the split. The i7-1260U therefore has more physical cores but only 4 additional threads, consistent with a hybrid layout where some cores do not add threads.

Clock behavior reflects their different missions. The i3-12100E has a base clock of 3.20 GHz and a boost clock of 4.20 GHz, with a 60 W TDP. The i7-1260U lists a base clock of 1100.00 MHz and a boost clock of 4.70 GHz, with a dramatically lower 9 W TDP. The i7-1260U's high boost clock explains its strong single-thread showing in Cinebench R15, but the low base clock and power envelope cap sustained multi-core performance.

Cache is identical in structure: 80 KB of L1 per core, 1.25 MB of L2 per core, and 12 MB of shared L3 cache. Die size is recorded for the i3-12100E at 163 mm², while no die size is available for the i7-1260U.

Memory support matches on both: DDR4 and DDR5, dual-channel. ECC memory is not supported on either. PCIe differs: the i3-12100E offers Gen 5 with 20 lanes (CPU only), while the i7-1260U is limited to Gen 4. Integrated graphics also differ, with the i3-12100E carrying UHD Graphics 730 and the i7-1260U carrying the more capable Iris Xe 96EU.

Sockets are incompatible. The i3-12100E uses Intel Socket 1700, the i7-1260U uses Intel BGA 1781. The desktop part is socketed and replaceable; the mobile part is soldered. Launch dates sit about seven weeks apart, with the i3-12100E released on 2022-01-03 and the i7-1260U on 2022-02-22. Both remain in active production.

Where Each One Wins

The i3-12100E is the choice for sustained multi-threaded workloads. Its 46.1% lead in Cinebench R23 multi-core and 21.2% lead in Geekbench multi-core are the clearest signals. Long rendering tasks, video encoding, and any workload that keeps all cores busy for minutes at a time will favor the desktop chip. The 30.6% advantage in Passmark extended instructions also points to AVX-style workloads running much faster on the i3-12100E. Passmark physics, which favors the i3-12100E by 13.3%, reinforces the pattern for simulation and compute-heavy tasks.

The i7-1260U wins where the workload is bursty or uses specific instruction paths. Its 14.9% lead in Passmark data encryption shows a strong showing for cryptographic operations. The 10.9% lead in Passmark integer math indicates that pure integer crunching runs faster on the mobile chip. Random string sorting goes to the i7-1260U by 3.8%, and find prime numbers by 6%. Cinebench R15 multi-core and single-core also favor the i7-1260U, but those are older test versions and the newer R20 and R23 runs reverse the single-core result.

For general desktop use, the i3-12100E holds the edge in single-thread performance across most modern benchmarks. Geekbench single-core at 13.7% and Passmark single-thread at 9% are decisive. The i7-1260U's only modern single-core win is the older Cinebench R15, which is less representative of current software.

FAQ

Q: Which CPU is faster in multi-core rendering?

A: The i3-12100E is significantly faster. It leads by 46.1% in Cinebench R23 multi-core (11,559 versus 7,912.5) and by 21.2% in Geekbench multi-core (7,661 versus 6,320).

Q: Does the i7-1260U beat the i3-12100E in any important workloads?

A: Yes. The i7-1260U wins Passmark data encryption by 14.9% (9,480 versus 8,069) and Passmark integer math by 10.9% (45,887 versus 40,885). It also wins Cinebench R15 multi-core by 3.2% and random string sorting by 3.8%.

Q: The i7-1260U has 10 cores, why does it lose so many multi-core tests?

A: The i7-1260U has a 9 W TDP and a base clock of 1100.00 MHz. The i3-12100E has a 60 W TDP and a base clock of 3.20 GHz. The desktop chip can sustain high clocks across all cores, while the mobile chip cannot maintain performance under sustained load.

Q: Which chip has better single-core performance?

A: The i3-12100E wins most modern single-core tests: Cinebench R23 single-core by 1.9%, Cinebench R20 single-core by 2.5%, Geekbench single-core by 13.7%, and Passmark single-thread by 9%. The i7-1260U only wins the older Cinebench R15 single-core test by 25.3%.

Q: Are these chips interchangeable in a build?

A: No. The i3-12100E uses Intel Socket 1700 and is a desktop part. The i7-1260U uses Intel BGA 1781 and is a mobile part. They are not compatible with the same motherboards.

Q: Which CPU has better integrated graphics?

A: The i7-1260U has Iris Xe 96EU, while the i3-12100E has UHD Graphics 730. The i7-1260U's integrated GPU is the more capable of the two based on the product tier.

The Verdict

The data points to a clear split by use case. For a desktop system where sustained performance matters, the i3-12100E is the stronger processor. It wins 13 of 19 benchmarks, and its wins include the largest margins in the entire comparison. The 46.1% lead in Cinebench R23 multi-core and 21.2% lead in Geekbench multi-core mean rendering and compilation workloads will finish substantially faster. The 30.6% lead in extended instructions benefits scientific and media workloads that use advanced SIMD. Single-thread performance also favors the i3-12100E in the modern test versions, so everyday responsiveness is not sacrificed.

The i7-1260U is the right pick for a thin, power-limited mobile system. Its 9 W TDP is a fraction of the i3-12100E's 60 W, and it still manages to beat the desktop chip in encryption, integer math, and the older Cinebench R15 tests. For a laptop user whose workloads involve cryptography, integer-heavy processing, or short bursts of single-thread activity, the i7-1260U holds its own. The Iris Xe 96EU graphics also give it an edge for light gaming or media acceleration without a discrete GPU.

Both processors sit at the 70th percentile against all CPUs in the database, so neither is a weak choice in absolute terms. The i3-12100E posts a higher average benchmark score of 16,853 against the i7-1260U's 16,320. If the question is raw compute in a desktop, the i3-12100E wins. If the question is efficiency and mobility, the i7-1260U wins. The decision should be made by the platform, not the benchmark sheet.

Specification Differences

| Specification | Intel Core i3-12100E | Intel Core i7-1260U |

|---|---|---|

| Cores | 4 | 10 |

| Threads | 8 | 12 |

| Base clock | 3.20 GHz | 1100.00 MHz |

| Boost clock | 4.20 GHz | 4.70 GHz |

| TDP | 60 W | 9 W |

| Socket | Intel Socket 1700 | Intel BGA 1781 |

| Codename | Alder Lake-S | Alder Lake-U |

| Generation | Core i3 (Alder Lake-S) | Core i7 (Alder Lake-U) |

| Die size | 163 mm² | Not specified |

| PCIe | Gen 5, 20 Lanes (CPU only) | Gen 4 |

| Integrated graphics | UHD Graphics 730 | Iris Xe 96EU |

| Market segment | Desktop | Mobile |

| Launch MSRP | $125 | Not specified |

Both share the same 10 nm process node, L1 cache of 80 KB per core, L2 cache of 1.25 MB per core, 12 MB shared L3 cache, DDR4/DDR5 dual-channel memory support, and no ECC memory support. Neither has an unlocked multiplier. The i3-12100E's launch MSRP is $125; no launch MSRP is recorded for the i7-1260U.